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NVMe: Do not cancel command multiple times

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Cancelling an already cancelled command does not do anything, so check
the command context before cancelling it, continuing if had already been
cancelled so we do not log the same problem every second if a device
stops responding.

Signed-off-by: Keith Busch <[email protected]>
Signed-off-by: Matthew Wilcox <[email protected]>
This commit is contained in:
Keith Busch 2013-04-30 11:19:38 -06:00 • committed by Matthew Wilcox
commit 053ab702cc
1 changed files with 2 additions and 0 deletions
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2
drivers/block/nvme-core.c
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@ -978,6 +978,8 @@ static void nvme_cancel_ios(struct nvme_queue *nvmeq, bool timeout)
if (timeout && !time_after(now, info[cmdid].timeout))
continue;
if (info[cmdid].ctx == CMD_CTX_CANCELLED)
continue;
dev_warn(nvmeq->q_dmadev, "Cancelling I/O %d\n", cmdid);
ctx = cancel_cmdid(nvmeq, cmdid, &fn);
fn(nvmeq->dev, ctx, &cqe);